I redesign efront theme from default to exciting UX, but efront's layout using "table" code, if we inspect the code, we can see the fabulous of classical "table", divide every modular blocks in every page. I try to search where the code can edited, but still I can't found it. I want convert to tableless design, retype in clear DIV. Anyone have a way out? please help, which files should I edit?. Thanks

Over there, you can find all the tpl files that you need. Althougth i think it is really difficult what you are trying to do.. Better try and build your own theme... take a look at the following guide..